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This study presents a reliability evaluation method of the scroll compressor for system air conditioner. After conducting reliability target determination and failure analysis (failure mode and effect analysis) on the scroll compressor, the significance of the stress factors affecting wear (main failure mode) is evaluated using design of experiments. Specifically, wear is estimated under various test...
In recent years, many studies have been conducted on coastal erosion. In addition, the monitoring of bathymetry changes in shallow water regions is being acknowledged as an important aspect of studies on coastal erosion. Erosion monitoring implies monitoring of the bathymetry changes after the occurrence of major causes of erosion, such as typhoons. However, it could be very difficult to use the sensors...
This research develops an underwater construction robot to level rubbles on the seabed for port construction. The rubble leveling is carried out by an underwater robot equipped with imaging sonars and underwater cameras, LBL and gyroscope sensors. A virtual reality system is developed to visualize the robot's figure and the topography over the working environment; hence, the robot is virtually tele-operated...
This paper presents the implementation of precise underwater navigation system using two acoustic ranging sonars for shallow water depth application. Estimation of accurate positions is a key issue to achieve qualified navigation solution used for underwater construction and survey using side scan sonar, multi-beam echo-sounder, scanning imaging sonar, sub-bottom profiler and underwater camera image...
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